these 4 derivations will be built:
  /nix/store/rrs00l82c7840jwblfk2vwa9cyxk58n2-dsh-source.drv
  /nix/store/51zn7lnpakb4pvf0fzlkp6y1xnf4jwmd-dsh-0.1.7-rc.2-npm-deps.drv
  /nix/store/yc3kfz9ws5mzcq7gzizqx0lq53zx1ap0-dsh-0.1.7-rc.2.drv
  /nix/store/2bvkx5rv6xxdjfr73ib4i1zxknl6n47v-check-dsh.drv